Choking on Construction Dust

  • Scientists say that inhaling those fine particles often found at construction sites is bad for the lungs and the heart (Photo courtesy of the National Centers for Environmental Prediction)

For most of us, the dust kicked
up by a construction site seems like a
minor nuisance. But it can be a health
hazard. As Karen Kelly reports, construction
dust is one source of air pollution that’s
largely been ignored:

Transcript

For most of us, the dust kicked
up by a construction site seems like a
minor nuisance. But it can be a health
hazard. As Karen Kelly reports, construction
dust is one source of air pollution that’s
largely been ignored:

If you’ve ever had the good fortune of living near a construction site, you
probably know a bit about dust.


Here in Ottawa, Canada, Mahad Adam can tell you all about it.

(construction sound)

For the past year, he’s lived across the street from a construction site that fills
an entire city block.

And he says the air quality can be terrible.

“Sneezing a lot, yes. Since the dust comes in during the whole day that they’ve
been working, it was constant dust inside the room so it was like having an
allergy.”

Trucks and bulldozers drive in and out of the site all day. They’re tracking mud
on the streets and the air is filled with dust.

Once that dirt is on the pavement, it’s kicked back up by every car that passes
by.

The construction site’s supervisor, Brad Smith, says he’s received lots of
complaints about the dust from nearby residents, especially seniors.

“I’m used to the dust and the dirt, whereas some of the people with breathing
problems and stuff that live in the community will be affected negatively more
than we are.”

In fact, too much dust can even be dangerous for people with respiratory
illnesses such as asthma.

To keep it under control, he says his company flushes the dirt off the streets
twice a week and then vacuums the rest up with a special truck.

He says the amount of cleaning they do depends on who they’re working for.

“My client is the city of Ottawa and they wrote that into the contract during
tender time. Whereas other projects I’ve been on, it can get into a bit of an
argument because it costs us and we push back a little bit.”

Smith says his company could get a fine if they leave debris on the roads.

But it’s hard to find a specific law – whether here in Canada or in the U.S. –
either at the national level, the state level, or even the local level that deals
directly with the dust coming off of construction sites.

The officials I talked to said that’s because it’s a temporary nuisance.

But what got me thinking about it was the research from Professor Brian
McCarry at McMaster University in Ontario.

He drove around his city measuring air pollution at different sites and he found
the cloud of dust kicked up when you pass a construction site is not something
you want to be breathing.

“In some cases you’re kicking up so much dust that the fine particles –
the things that cause health effects – are at levels that are there for concern.”

Scientists say that inhaling those fine particles is bad for the lungs and the
heart.

But McCarry says keeping the air clean around a construction site is actually
not that hard.

“It’s just housekeeping, it’s nothing more complex than that, and if you tell
them the housekeeping is higher in this area than elsewhere, they’ll do it.”

That can mean spraying down dusty roads with water or a sticky pine
substance.

Or using the vacuum truck more frequently in areas where there’s construction.

When companies started doing that, McCarry says there was a big drop in the
air pollution at those sites.

Now, local laws require that cleanup.

McCarry argues those laws should be everywhere.

For The Environment Report, I’m Karen Kelly.

Related Links

Building an Ark for the World’s Plants

  • Prairie plants are being lost to development.(Courtesy of Fermi National Accelerator Laboratory)

You’ve heard about the ark Noah built to save the world’s animals. Now comes news of another kind of ark – one designed to help save the world’s plants. The Great Lakes Radio Consortium’s Sandy Hausman has that story:

Transcript

You’ve heard about the ark Noah built to save the world’s animals. Now
comes news of another kind of ark – one designed to help save the
world’s plants. The Great Lakes Radio Consortium’s Sandy Hausman
has that story:


(Sound of walking through the prairie up then under)


You might say Pati Vitt is looking for the right stock to fill the ark.
She’s dressed in jeans and a t-shirt, her long brown hair in braids, a field
notebook in hand, and a pencil tied to her pants. For nine months of each
year, she wanders along railroad tracks, through old cemeteries and
nature preserves, filling shopping bags with the seeds of prairie plants.


Vitt is a conservation scientist with the Chicago Botanic Garden. She has
studied these plants since she was a child. She knows their Latin names.
She dreams about them at night. She even knows the intimate details of
their reproductive lives:


“One does it having teeny little flowers and taking small little bees, and
another one does it by having huge flowers and lots of nectar and they
have really big bees or maybe a moth that pollinates them.”


And, she says, prairie plants are hearty. Native to the Upper Midwest,
they can handle icy winters and long, hot droughts, but they can’t fight
plows or bulldozers. Farmers and developers have destroyed almost all
the land where prairie plants once grew. Today, one-tenth of one percent
of the original prairie remains.


“That means that what we’re looking at right here is one-tenth of one
percent of the population that this plant once enjoyed. I’m sorry. Even
though there’s a lot in this prairie, this plant should be endangered,
because there are so few acres of its habitat left and everyday we’re
coming and we’re taking more and more of it. The prairie habitat is more
endangered than tropical rainforest.”


That worries Vitt, not only because she thinks the prairie plants are
beautiful, but because they may have value to people. For example, she
says about half of our modern medicines came – originally – from plants
or the fungus found in the soil beneath them.

“If you think about penicillin… penicillin came from mold. We might be
standing on a treasure trove of antibiotics, which we need, but if we let
the plants go, we let the soil fungi go, we let the potential antibiotics go.”


(Sound of seeds dropping into a jar)


So Vitt is collecting prairie seeds from about 1,500 plants and shipping
them to the English countryside.


(Sound of birds)


Just south of London, the British government has built what it hopes will
be the largest seed bank in the world devoted to wild plants. The
building looks like a series of greenhouses made from concrete, stone,
glass and steel. In the basement, fire and bombproof vaults hold billions of
seeds from 24,000 species:


“That’s the exciting bit. We thought big.”


Michael Way is a scientist at the Millennium Seed Bank. He says it’s
needed now because a lot of wild plants are in danger of
disappearing because of global warming and the pace of human
development. Way believes a third of the world’s plant species could be
gone by 2050.


“You hope that the worst is not going to happen. Of course, from time to
time the worst does happen. If a plant population is destroyed, if a
decision is taken to build houses or factories or roads on a particular area
which was home to some quite special plants, seed banking is one tool
you can use to protect that genetic diversity that might be unique to that
site.”


Each day, seeds arrive from Africa, Australia, Europe, the Middle East
and the Americas. They sit in colorful plastic crates — waiting to be
cleaned, dried and frozen. Way says these seeds could survive for a
century or more.


“Seeds are tough – small but tough, and the whole point of seeds is to be
dormant and allow themselves to be transported around, so unless we do
something really stupid, they will remain viable.”


Back in the U.S., Pati Vitt says seed banks like the one near London
could mean the survival of humanity, since people can’t live without
plants.


“I think fundamentally we all understand that we are a part of nature, but
in our daily lives we get so cut off from it that we forget.”


She sees the Earth as a garden, and she wants people to act like
gardeners. Setting up seed banks is an important first step.


“We will have the tools that we need to bring things back if necessary.”


For the GLRC, I’m Sandy Hausman.

Related Links

Stricter Rules for Heavy Equipment Emissions?

The Environmental Protection Agency is proposing new clean-air standards for some diesel-powered equipment. The Great Lakes Radio Consortium’s Lester Graham reports:

Transcript

The Environmental Protection Agency is proposing new clean-air standards for some diesel
powered equipment. The Great Lakes Radio Consortium’s Lester Graham reports:


The EPA’s new rules would cut the soot and pollution that’s belched by off-road diesel vehicles
such as bulldozers and farm tractors. Frank O’Donnell is with the environmental group Clean Air
Trust.


“Currently there are very minimal controls on big diesel heavy equipment and the fuel itself is
extremely dirty. It’s virtually unregulated. And this EPA proposal will go a long way, over time,
making a significant reduction in the diesel pollution coming from heavy equipment.”


The EPA projects the new rules will prevent almost ten-thousand premature deaths each year
once the standards are fully phased in. But, that’ll take a while with the last of the dirty vehicles
probably taken out of service around the year 2030.


For the Great Lakes Radio Consortium, this is Lester Graham.